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    • zeupater
    • By zeupater 7th Jan 13, 4:36 PM
    • 4,649Posts
    • 6,221Thanks
    zeupater
    Solar ... In the news
    • #1
    • 7th Jan 13, 4:36 PM
    Solar ... In the news 7th Jan 13 at 4:36 PM
    Hi All

    Thought it was about time we had a thread specifically to discuss relevant press articles relating to solar pv & thermal ..... so here goes ...

    Z
    Last edited by zeupater; 07-01-2013 at 4:48 PM.
    "We are what we repeatedly do, excellence then is not an act, but a habit. " ...... Aristotle
Page 122
    • michaels
    • By michaels 15th Apr 19, 2:31 PM
    • 22,322 Posts
    • 102,909 Thanks
    michaels
    This makes a lot of sense

    20p/day standing charge & 15p/KWh for normal electricity consumption as is the case today

    6p/kWh for smart BEVs and smart heating

    BEVs charged at super chargers (mostly) feeding off the HVAC grid. This is roughly 6% more efficient than home charging off the LVAC grid but also means no additional load onto the LVAC last mile grid

    BEVs might add as much as 150 TWh to demand but only to the HVAC grid

    Smart heating with heat pumps and electric resistance (80%/20%) will add about 110TWh electricity demand (to both the HVAC and the LVAC) but displace 300TWh of NG demand.

    Can the current grid cope?

    UK grid has sustained 65GW so could move 240TWh/yr more than it does now (smart BEVs/heating making sure peaks don't pass peak 65GW or similar). So the HVAC grid will probably be ok (especially for BEVs)

    Can the LVAC grid handle 110TWh additional demand?
    Possibly because the LVAC grid is the lowest capacity usage part of the grid and we know the LVAC grid historically moved 30TWh/yr more than now so there is a lot of headroom from today even if it isn't the full 110TWh

    Meeting this 260TWh of additional demand over a 20 year conversion would need just 2.7GW of offshore wind and PV per year (45% CF & 11% CF)

    300TWh less gas demand
    450TWh less oil demand
    260TWh more electricity demand

    Significantly greener than today
    Greatly helped by variable electricity pricing
    Originally posted by GreatApe
    Without local storage though? Heat pumps are least efficient when it is coldest, similarly EVs do lower mileage when it is cold and wet. So annual totals may well be fine but specific peak periods could still be a problem.
    Cool heads and compromise
    • Martyn1981
    • By Martyn1981 15th Apr 19, 5:18 PM
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    • 13,066 Thanks
    Martyn1981
    Without local storage though? Heat pumps are least efficient when it is coldest, similarly EVs do lower mileage when it is cold and wet. So annual totals may well be fine but specific peak periods could still be a problem.
    Originally posted by michaels
    I wouldn't encourage him, the assumptions are always silly. If you recall, he denied the existence of the distribution network for a month whilst claiming the grid costs households 10p per day for 100kW, and didn't believe me when I explained (repeatedly) it was about 30p per day for 20-25kW, about 12x the cost ratio he was 'claiming'.

    Best to simply look at 'a household' to get a rational picture, and for UK average mileage we see approx 7.900 miles per year, which averages out at about 2,000kWh pa, or 5.5kWh per day. If that's spread over approx 10hrs in the evening/night, then the average additional household load per car will be approx 550W, far, far (far, far, far, far) less, than a peak evening load.

    Nationally, cars would add 16.5GW (30m x 0.55kW) to the low demand period, though we'd also see a reduction in oil refinery demand as it consumes around 6kWh/gallon of petrol or diesel.

    No probs.
    Mart. Cardiff. 5.58 kWp PV systems (3.58 ESE & 2.0 WNW)

    For general PV advice please see the PV FAQ thread on the Green & Ethical Board.
    • Martyn1981
    • By Martyn1981 16th Apr 19, 5:39 PM
    • 8,306 Posts
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    Martyn1981
    It only seems like yesterday when the nuclear advocates on here were claiming Drax coal generation could match UK annual PV generation in just 12-20mins*.

    So it's nice to see PV matching coal generation in 2019 Q1. Oh how the mighty have fallen.

    *It was actually early 2012, and the 'expert' was out by a factor of 1,000 (MWh's and GWh's can be tricky to understand).

    Renewables Generate 33% Of Britainís Electricity In First Quarter

    According to EnAppSysí figures, a total of 27.2 terawatt-hours (TWh) of renewable electricity was generated over the first quarter of 2019 in Great Britain (as opposed to the United Kingdom, which includes the Republic of Ireland), 16.6 TWh of which came from wind farms (in line with previous quarters) while solar generated 2.7 TWh (up 43% from the previous quarter and up 46% from Q1 2018).

    These figures from renewable generation compare favorably with the rest of Britainís energy mix, where natural gas-fired power plants generated 32.2 TWh, or 39.5% of Britainís total, while nuclear energy generated 13.1 TWh, or 16%.

    The figures also highlight the continued decline of coal in Great Britainís energy mix, which produced only 2.9 TWh over the first quarter, down 37.2% from the previous quarter and down 65% from the same quarter a year earlier.
    Mart. Cardiff. 5.58 kWp PV systems (3.58 ESE & 2.0 WNW)

    For general PV advice please see the PV FAQ thread on the Green & Ethical Board.
    • ed110220
    • By ed110220 16th Apr 19, 6:10 PM
    • 1,132 Posts
    • 599 Thanks
    ed110220
    It only seems like yesterday when the nuclear advocates on here were claiming Drax coal generation could match UK annual PV generation in just 12-20mins*.

    So it's nice to see PV matching coal generation in 2019 Q1. Oh how the mighty have fallen.

    *It was actually early 2012, and the 'expert' was out by a factor of 1,000 (MWh's and GWh's can be tricky to understand).

    Renewables Generate 33% Of Britainís Electricity In First Quarter
    Originally posted by Martyn1981

    According to MyGridGB...

    It's also notable that for the past 12 months not only has solar (10.6 TWh) exceeded coal (9.7 TWh) but also "new renewables" (solar and wind, but not biomass or hydro) at 52.3 TWh have almost caught up with nuclear at 55.3 TWh.

    I believe it won't be long before they overtake it.
    • Martyn1981
    • By Martyn1981 18th Apr 19, 3:55 PM
    • 8,306 Posts
    • 13,066 Thanks
    Martyn1981
    Worldwide PV hits 500GWp. No longer doubling every two(ish) years, but still growing nicely.

    And German auction prices have stalled a bit, at around £50/MWh, but that still suggests that the UK Government could probably issue net subsidy free CfD's if capped around £45-£50/MWh. Just having a guaranteed income would help to reduce costs by bringing down financing costs.

    Solar once again the only winner in German renewables auctions
    Mart. Cardiff. 5.58 kWp PV systems (3.58 ESE & 2.0 WNW)

    For general PV advice please see the PV FAQ thread on the Green & Ethical Board.
    • Martyn1981
    • By Martyn1981 21st Apr 19, 6:23 AM
    • 8,306 Posts
    • 13,066 Thanks
    Martyn1981
    Nice little read, and explains how PPA's how solved the supply or demand side PV question.

    Supply side is cheaper to install, but sells into a low value market (wholesale prices), whilst demand side PV (often roof mounted and small scale) costs more to install, but 'sells' into a higher value market (retail prices). PPA's sit in the middle (sort of).

    The weekend read: European solar comes of PPAge
    Mart. Cardiff. 5.58 kWp PV systems (3.58 ESE & 2.0 WNW)

    For general PV advice please see the PV FAQ thread on the Green & Ethical Board.
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